Android Question Bluetooth conection

[fernando.oliboni]

Sub Timer1_Tick
    If connected Then
        If TextReader1.Ready Then 'check if there is any data waiting to be read
            txt_chat.Text = txt_chat.Text & TextReader1.ReadLine & CRLF
            txt_chat.SelectionStart = txt_chat.Text.Length
        End If
    End If
End Sub

I'm using the code below and it's working fine with ESP32, I'm talking to ESP32 and GRBL, sending command and getting OKs.
1) I just wanted to understand the reason for using a timer associated with sending messages.
2) Why the value of 200 milliseconds? Would it be a sufficient amount of waiting? If the response occurs before then, is the clock reset?
Could someone explain this dynamic to me?

 

[Erel]

Network communication based on TextReader is a guaranteed failure.

You should use AsyncStreams. If you are using B4R to program the ESP32 then you can use prefix mode + B4RSerializator. This makes things very simple.
If not then you should still use AsyncStreams.

 

[fernando.oliboni]

Network communication based on TextReader is a guaranteed failure.

You should use AsyncStreams. If you are using B4R to program the ESP32 then you can use prefix mode + B4RSerializator. This makes things very simple.
If not then you should still use AsyncStreams.

Hi Erel, I don't use B4R, I use B4A. Could you give me an example of using AsyncStreams with connecting, sending and receiving messages? Thanks Fernando

 

[fernando.oliboni]

Network communication based on TextReader is a guaranteed failure.

You should use AsyncStreams. If you are using B4R to program the ESP32 then you can use prefix mode + B4RSerializator. This makes things very simple.
If not then you should still use AsyncStreams.

I only use classic bluetooth connection

 

[Erel]

[B4XPages] Bluetooth Chat Example

Updated implementation, based on B4XPages of https://www.b4x.com/android/forum/threads/android-bluetooth-bluetoothadmin-tutorial.14768/#content. The code is much simpler compared to the previous example. Note that you can call Serial.Listen without making the device discoverable. This is useful...

www.b4x.com